Stability and absolute stability of a general 2-D non-linear FM second model

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Stability and absolute stability of a general 2-D non-linear FM second model

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This study deals with the stability and absolute stability of the general 2-D non-linear time-invariant Fornasini–Marchesini (FM) second model. At first, a Lyapunov-type stability theorem is presented to sufficiently guarantee the stability and (globally) asymptotical stability of general 2-D non-linear FM second model. Then, for the globally asymptotical stability, it is further improved to lessen the conservatism of the stability theorem. More importantly, the improved theorem can derive global stability criteria which have the form of linear matrix inequalities. Furthermore, based on the two theorems, some absolute stability criteria are obtained for 2-D FM second model with sector-bounded non-linearity. Finally, three numerical examples show the advantage of the improved stability theorem.

Inspec keywords: nonlinear control systems; control nonlinearities; stability criteria; linear matrix inequalities; asymptotic stability

Other keywords: linear matrix inequalities; sector-bounded nonlinearity; globally asymptotical stability; global stability criteria; absolute stability; general 2D nonlinear time-invariant Fornasini-Marchesini second model

Subjects: Linear algebra (numerical analysis); Nonlinear control systems; Stability in control theory

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http://iet.metastore.ingenta.com/content/journals/10.1049/iet-cta.2009.0624
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